Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
"Pennsylvania Avenue, Washington, 1902." Landmarks in this view from the Treasury steps at 15th Street include the Capitol and Old Post Office. On the bill at Chase's Polite Vaudeville: Capt. Woodward's trained seals. 8x10 inch glass negative by William Henry Jackson, Detroit Publishing Co. View full size.